Multiscale Transfer Printing via Shape Memory Polymer with High Adhesion and Modulus Switchability

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Flexible electronics require advanced fabrication methods for integrating rigid components onto pliable substrates.
• Existing transfer printing techniques face challenges in handling diverse materials and achieving multiscale precision.

Purpose of the Study:

• To develop a versatile multiscale transfer printing technique for fabricating flexible electronic devices.
• To utilize a shape memory polymer (SMP) as a reusable stamp and receiver for enhanced printing capabilities.

Main Methods:

• Development of an ultraviolet-curable shape memory polymer (SMP) with tunable mechanical properties.
• Implementation of a transfer printing process utilizing the SMP's adhesion switchability and shape recovery.
• Demonstration of in situ transfer of various materials and multiscale metallic structures.

Main Results:

• The SMP exhibited excellent toughness at room temperature and flexibility near its glass transition temperature.
• The technique successfully achieved robust transfer printing of diverse objects and in situ fabrication of multiscale metallic structures.
• Transparent hyperthermia patches with embedded metal grids were successfully fabricated for potential applications.

Conclusions:

• The developed SMP-based transfer printing technique offers a robust and versatile solution for flexible electronics fabrication.
• This method facilitates the integration of diverse electronic components, enabling advanced applications in sensors and wearable devices.
• The in situ fabrication capability opens new avenues for creating functional electronic skins and biomedical devices.